MESON Chess Problem Database

Problem Display
PID: 135630 (2Q3Rb/5nPk/8/8/5K2/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

2Q3Rb/5nPk/8/8/5K2/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kg6
      • 2.gxh8Q#
    • 1...Se5
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Sg5
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Sd6
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Sh6
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Sd8
      • 2.gxh8Q#
      • 2.gxh8R#
  • Tries
    • 1.Qh3+?
      • 1...Kg6
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Sh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Kxg8!
  • Keys
    • 1.Qf8!
      • 1...Kg6
        • 2.gxh8Q#
      • 1...Kh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Bxg7
        • 2.Qxg7#
      • 1...Se5
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sg5
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sd6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sd8
        • 2.gxh8Q#
        • 2.gxh8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::PXB(c)=Q
    • S(a);N_GUARD::PXB(c)=Q
    • S(a);N_GUARD,SBLOCK::PXB(c)=Q
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::PXB(c)=Q
        • S(a);P_SPINS(a)::PXB(c)=Q
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::PXB(c)=Q
      • K(b);P-FLIGHT::PXB(c)=Q
      • B(c);OGATE,XP(B)::QAR1(C),XB(c)
      • S(a);N_GUARD::PXB(c)=Q
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).